2640306543 has 24 divisors (see below), whose sum is σ = 4099165488. Its totient is φ = 1507274496.

The previous prime is 2640306541. The next prime is 2640306547. The reversal of 2640306543 is 3456030462.

It is not a de Polignac number, because 2640306543 - 2¹ = 2640306541 is a prime.

It is a super-2 number, since 2×2640306543² = 13942437282017221698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640306541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152455 + ... + 168887.

It is an arithmetic number, because the mean of its divisors is an integer number (170798562).

Almost surely, 2^2640306543 is an apocalyptic number.

2640306543 is a deficient number, since it is larger than the sum of its proper divisors (1458858945).

2640306543 is a wasteful number, since it uses less digits than its factorization.

2640306543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17543 (or 17536 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 33.

The square root of 2640306543 is about 51383.9132705947. The cubic root of 2640306543 is about 1382.1381374134.

The spelling of 2640306543 in words is "two billion, six hundred forty million, three hundred six thousand, five hundred forty-three".